DEVELOPMENT METHOD OF OIL DEPOSITS BY MEANS OF WELL INTERCONNECTED THROUGH PRODUCTIVE FORMATION Russian patent published in 2013 - IPC E21B43/16 E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: method involves construction of interconnecting horizontal wells with their insulation to horizontal part and vertical wells with a working face below level of the formation bottom with extraction of product from vertical wells. According to the invention, vertical wells are built as per a design network, in which geological field researches are performed to determine properties of formation, extracted product and critical pressure of the formation. Then, out of a vertical well there built are at least two horizontal wells in the direction of another similar vertical well with the working face located at the distance not exceeding 10 m from the other vertical well, with further hydraulic fracturing of the formation to provide interaction between wells. Horizontal wells directed opposite each other are separated as to width and as to height of formation by not less than 10 m. Vertical well is equipped with a pump lowered on a pipe string below the formation bottom and interconnection point with horizontal wells so that tubular annulus is formed. Product is extracted with reduction of hydrodynamic level of the formation not less than critical pressure; at that, tubular annulus at the head is interconnected with a vacuum pump inlet.

EFFECT: increasing productivity of wells and oil extraction.

1 ex, 2 dwg